widget/gonk/HwcUtils.cpp@6474c204b198 (annotated)
widget/gonk/HwcUtils.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (c) 2013 The Linux Foundation. All rights reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| michael@0 | 5 | * you may not use this file except in compliance with the License. |
| michael@0 | 6 | * You may obtain a copy of the License at |
| michael@0 | 7 | * |
| michael@0 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| michael@0 | 9 | * |
| michael@0 | 10 | * Unless required by applicable law or agreed to in writing, software |
| michael@0 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| michael@0 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| michael@0 | 13 | * See the License for the specific language governing permissions and |
| michael@0 | 14 | * limitations under the License. |
| michael@0 | 15 | */ |
| michael@0 | 16 | |
| michael@0 | 17 | #include <android/log.h> |
| michael@0 | 18 | #include "HwcUtils.h" |
| michael@0 | 19 | #include "gfxUtils.h" |
| michael@0 | 20 | |
| michael@0 | 21 | #define LOG_TAG "HwcUtils" |
| michael@0 | 22 | |
| michael@0 | 23 | #if (LOG_NDEBUG == 0) |
| michael@0 | 24 | #define LOGD(args...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, ## args) |
| michael@0 | 25 | #else |
| michael@0 | 26 | #define LOGD(args...) ((void)0) |
| michael@0 | 27 | #endif |
| michael@0 | 28 | |
| michael@0 | 29 | #define LOGE(args...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, ## args) |
| michael@0 | 30 | |
| michael@0 | 31 | |
| michael@0 | 32 | namespace mozilla { |
| michael@0 | 33 | |
| michael@0 | 34 | /* Utility functions for HwcComposer */ |
| michael@0 | 35 | |
| michael@0 | 36 | |
| michael@0 | 37 | |
| michael@0 | 38 | /* static */ bool |
| michael@0 | 39 | HwcUtils::PrepareLayerRects(nsIntRect aVisible, const gfxMatrix& aTransform, |
| michael@0 | 40 | nsIntRect aClip, nsIntRect aBufferRect, |
| michael@0 | 41 | bool aYFlipped, |
| michael@0 | 42 | hwc_rect_t* aSourceCrop, hwc_rect_t* aVisibleRegionScreen) { |
| michael@0 | 43 | |
| michael@0 | 44 | gfxRect visibleRect(aVisible); |
| michael@0 | 45 | gfxRect clip(aClip); |
| michael@0 | 46 | gfxRect visibleRectScreen = aTransform.TransformBounds(visibleRect); |
| michael@0 | 47 | // |clip| is guaranteed to be integer |
| michael@0 | 48 | visibleRectScreen.IntersectRect(visibleRectScreen, clip); |
| michael@0 | 49 | |
| michael@0 | 50 | if (visibleRectScreen.IsEmpty()) { |
| michael@0 | 51 | LOGD("Skip layer"); |
| michael@0 | 52 | return false; |
| michael@0 | 53 | } |
| michael@0 | 54 | |
| michael@0 | 55 | gfxMatrix inverse(aTransform); |
| michael@0 | 56 | inverse.Invert(); |
| michael@0 | 57 | gfxRect crop = inverse.TransformBounds(visibleRectScreen); |
| michael@0 | 58 | |
| michael@0 | 59 | //clip to buffer size |
| michael@0 | 60 | crop.IntersectRect(crop, aBufferRect); |
| michael@0 | 61 | crop.Round(); |
| michael@0 | 62 | |
| michael@0 | 63 | if (crop.IsEmpty()) { |
| michael@0 | 64 | LOGD("Skip layer"); |
| michael@0 | 65 | return false; |
| michael@0 | 66 | } |
| michael@0 | 67 | |
| michael@0 | 68 | //propagate buffer clipping back to visible rect |
| michael@0 | 69 | visibleRectScreen = aTransform.TransformBounds(crop); |
| michael@0 | 70 | visibleRectScreen.Round(); |
| michael@0 | 71 | |
| michael@0 | 72 | // Map from layer space to buffer space |
| michael@0 | 73 | crop -= aBufferRect.TopLeft(); |
| michael@0 | 74 | if (aYFlipped) { |
| michael@0 | 75 | crop.y = aBufferRect.height - (crop.y + crop.height); |
| michael@0 | 76 | } |
| michael@0 | 77 | |
| michael@0 | 78 | aSourceCrop->left = crop.x; |
| michael@0 | 79 | aSourceCrop->top = crop.y; |
| michael@0 | 80 | aSourceCrop->right = crop.x + crop.width; |
| michael@0 | 81 | aSourceCrop->bottom = crop.y + crop.height; |
| michael@0 | 82 | |
| michael@0 | 83 | aVisibleRegionScreen->left = visibleRectScreen.x; |
| michael@0 | 84 | aVisibleRegionScreen->top = visibleRectScreen.y; |
| michael@0 | 85 | aVisibleRegionScreen->right = visibleRectScreen.x + visibleRectScreen.width; |
| michael@0 | 86 | aVisibleRegionScreen->bottom = visibleRectScreen.y + visibleRectScreen.height; |
| michael@0 | 87 | |
| michael@0 | 88 | return true; |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | /* static */ bool |
| michael@0 | 92 | HwcUtils::PrepareVisibleRegion(const nsIntRegion& aVisible, |
| michael@0 | 93 | const gfxMatrix& aTransform, |
| michael@0 | 94 | nsIntRect aClip, nsIntRect aBufferRect, |
| michael@0 | 95 | RectVector* aVisibleRegionScreen) { |
| michael@0 | 96 | |
| michael@0 | 97 | nsIntRegionRectIterator rect(aVisible); |
| michael@0 | 98 | bool isVisible = false; |
| michael@0 | 99 | while (const nsIntRect* visibleRect = rect.Next()) { |
| michael@0 | 100 | hwc_rect_t visibleRectScreen; |
| michael@0 | 101 | gfxRect screenRect; |
| michael@0 | 102 | |
| michael@0 | 103 | screenRect.IntersectRect(gfxRect(*visibleRect), aBufferRect); |
| michael@0 | 104 | screenRect = aTransform.TransformBounds(screenRect); |
| michael@0 | 105 | screenRect.IntersectRect(screenRect, aClip); |
| michael@0 | 106 | screenRect.Round(); |
| michael@0 | 107 | if (screenRect.IsEmpty()) { |
| michael@0 | 108 | continue; |
| michael@0 | 109 | } |
| michael@0 | 110 | visibleRectScreen.left = screenRect.x; |
| michael@0 | 111 | visibleRectScreen.top = screenRect.y; |
| michael@0 | 112 | visibleRectScreen.right = screenRect.XMost(); |
| michael@0 | 113 | visibleRectScreen.bottom = screenRect.YMost(); |
| michael@0 | 114 | aVisibleRegionScreen->push_back(visibleRectScreen); |
| michael@0 | 115 | isVisible = true; |
| michael@0 | 116 | } |
| michael@0 | 117 | |
| michael@0 | 118 | return isVisible; |
| michael@0 | 119 | } |
| michael@0 | 120 | |
| michael@0 | 121 | /* static */ bool |
| michael@0 | 122 | HwcUtils::CalculateClipRect(const gfxMatrix& aTransform, |
| michael@0 | 123 | const nsIntRect* aLayerClip, |
| michael@0 | 124 | nsIntRect aParentClip, nsIntRect* aRenderClip) { |
| michael@0 | 125 | |
| michael@0 | 126 | *aRenderClip = aParentClip; |
| michael@0 | 127 | |
| michael@0 | 128 | if (!aLayerClip) { |
| michael@0 | 129 | return true; |
| michael@0 | 130 | } |
| michael@0 | 131 | |
| michael@0 | 132 | if (aLayerClip->IsEmpty()) { |
| michael@0 | 133 | return false; |
| michael@0 | 134 | } |
| michael@0 | 135 | |
| michael@0 | 136 | nsIntRect clip = *aLayerClip; |
| michael@0 | 137 | |
| michael@0 | 138 | gfxRect r(clip); |
| michael@0 | 139 | gfxRect trClip = aTransform.TransformBounds(r); |
| michael@0 | 140 | trClip.Round(); |
| michael@0 | 141 | gfxUtils::GfxRectToIntRect(trClip, &clip); |
| michael@0 | 142 | |
| michael@0 | 143 | aRenderClip->IntersectRect(*aRenderClip, clip); |
| michael@0 | 144 | return true; |
| michael@0 | 145 | } |
| michael@0 | 146 | |
| michael@0 | 147 | } // namespace mozilla |
